Abstract
Self-testing refers to the possibility of characterizing an unknown quantum device based only on the observed statistics. Here we develop methods for self-testing entangled quantum measurements, a key element for quantum networks. Our approach is based on the natural assumption that separated physical sources in a network should be considered independent. This provides a natural formulation of the problem of certifying entangled measurements. Considering the setup of entanglement swapping, we derive a robust self-test for the Bell-state measurement, tolerating noise levels up to ∼5%. We also discuss generalizations to other entangled measurements.
Originalsprog | Engelsk |
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Artikelnummer | 250507 |
Tidsskrift | Physical Review Letters |
Vol/bind | 121 |
Udgave nummer | 25 |
Antal sider | 6 |
ISSN | 0031-9007 |
DOI | |
Status | Udgivet - 2018 |